Classing clamp



Aug. 21, 1928.

A. MULLER CLASSING cum Filed Dec. 5, 1927 l qvmQ Patented Aug; 21; 1928.

UNITED STATES ARTHUR MI'TLL'ER, or BERN, SWITZERLAND.

. oLAssme CIiAMP.

I Application filed December 5, 1927, Serial No. 237,974, and in BelgiumJuly 26, 1927.

The present invention relates to a c-lassingclamp for' file-papers ofthe kind where lateral lugs formed on a rigid strip represent thestationary paws of clamps having mov able paws cooperating with thestationary paws and constituted of curved flat springs secured to theends of resilient strips and pressed down unto the stationary paws bymeans of hand operated slides guided within said rigid strip.

The classing clamps of this kind known heretofore did not give entiresatisfaction be cause the grip of the two paws was not safe enough.

In the clamp according to the present invention one of the pawspossesses at least two parallel ridges arranged so that in the closedposition oi the clamp the working edge of the movable paw engages thestationary paw exactly in the space left between the ends of the saidridges and the bent-up working edge of the stationary paw with a;

view of bending the paper in an .undulated form. This bending preventsany displacing of the clamped papers by some casual tract-ional effort.

The annexed drawing represents as an exampleone working form of theinventionr Fig. 1 is a perspective view of the whole and a Figs. 2 and 3arethe first a longitudinal section of theclosed clamp and the second across-section through a manually operated clamp. c

According. to the drawing a rigid strip 1 is provided with bent-uplongitudinal edges 2 forming a groove and with two lateral lugs 3representing the stationary paws of clamps. These lugs have two parallelridges 4: obtained by pressing the metal. paws of the clamps areconstituted of curved flatsprings 6 riveted to the free ends of aspringy strip 7 fixed at its middle part8 lo the strip 1. The flatspring 7 is bent in such a way that its two free arms have'the tendencyto stand up. These ends are bent down so as to close the clamps bysliding the The movable buttons 9in the groove of the strip 1. The uppersurface of these-buttons is roughened at 10 so as to afford a good holdfor the lingers. v V g The outer edges 5 of the stationary paws 3 ofthe-rigid strip 1 are bent-up as shown in Fig. 2. In the closed positionof the clamps the working edge ofthe movable paw bears on the space leftbetween-the ends of the ridges 4 and the bent-up edge of the stationarypaw.

If it is desired to put into the classing clamp some new file-papers,the two buttons 9 are pushed closeup to part 8 whereupon the arms of thespringystrip'i will stand up and the clamps beopened. The paper is nowlaid in upon the stationary paws 3 and the two buttons pushed asunder upto the ends of'the rigid strip. Then the working edges of the movablejaws will bear on the paper and bend it in an undnlated form so as tohold it firmly. A i

As means for fixing the rigid strip of the classing-clamp to the wrapperof a file-book there are rivets fixed at the holes 11 shown in Fig. I.

lVhat I claim as new is:

In a classing clamp for file papers adapted to be fastened to a coverboard and in combination, a rigid metallic strip provided at the endswith two lateral lugs and having bent-up lateral edges forming grooves.a resilient strip attached to the middle portion 'of the rigid strip andhaving both its ends bent-up between the grooves of the rigid strip.curved flat springs riveted to the up standing ends of this resilientstrip and extended sideways so as to match with the lateral lugs of therigid strip'with a view of forming clamps. and rectangular buttonsarranged slidably within said grooves and above each of theup-standinglegs of the resilient strip and having a roughened surface soas to present a safe grip when being operated.

In testimony whereof I affix my signature.

ARTHUR MULLER.

